CVE-2026-7888

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowedclasses restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been...

CVE-2026-7888 Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the Workflow, Form block, and File/Set components that lack the allowed_classes restriction.

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowedclasses restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been...

CVE-2026-7888

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowedclasses restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been...

CVE-2026-7888 Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize() calls in the Workflow, Form block, and File/Set components that lack the allowed_classes restriction.

Concrete CMS below 9.5.2 is vulnerable to PHP Object Injection via unserialize calls in the Workflow, Form block, and File/Set components that lack the allowedclasses restriction. An unauthenticated attacker may trigger arbitrary PHP object instantiation if a malicious serialized payload has been...

CVE-2026-7888

CVE-2026-7888 affects Concrete CMS versions below 9.5.2. The vulnerability arises from PHP Object Injection via unserialize() calls in the Workflow, Form block, and File/Set components that do not enforce allowed_classes. An unauthenticated attacker could trigger arbitrary PHP object instantiatio...

PT-2026-46047

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.2 Description PHP Object Injection occurs due to the use of unserialize calls within the Workflow, Form block, and File/Set components that do not implement the allowed classes restriction. This allows an...

CVE-2026-8340

Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with editfilecontents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version downgrade to an older version of a file, or activation of a co-editor's unpublished version. The...

CVE-2026-8347

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity...

CVE-2026-8353

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicio...

CVE-2026-8353

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicio...

EUVD-2026-31443

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicio...

CVE-2026-8353 Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in atomik theme

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicio...

CVE-2026-8353

Concrete CMS versions 9.0–9.5.0 are vulnerable to a Stored XSS in the Atomik theme triggered by a crafted page name. An attacker with editor privileges can inject JavaScript that runs in the context of any authenticated user visiting affected account pages, enabling session hijacking, credential ...

CVE-2026-8353 Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in atomik theme

Concrete CMS version 9.0 to 9.5.0 is vulnerable to Stored XSS via page name in the Atomik theme. A rogue editor can inject arbitrary JavaScript that executes in the context of any authenticated user visiting the affected account pages. This can lead to session hijacking, credential theft, malicio...

CVE-2026-8347

The CVE-2026-8347 entry affects Concrete CMS 9.5.0 and earlier, where the Express association Reorder dialog is vulnerable to IDOR and wrong-authorization-level handling, enabling cross-entity state tampering under view-only permissions. The issue is triggered by reliance on Express entity orderi...

CVE-2026-8347 Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express association Reorder dialog

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity...

CVE-2026-8347 Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express association Reorder dialog

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity...

CVE-2026-8347

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity...

EUVD-2026-31442

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog. This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity...

EUVD-2026-31441

Concrete CMS 9.5.0 and below is vulnerable to CSRF via Backend\File::approveVersion. Victim with editfilecontents permission is CSRF'd into publishing an attacker-chosen previously-uploaded version downgrade to an older version of a file, or activation of a co-editor's unpublished version. The...